Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim
Volatility-hygroscopicity tandem differential mobility analyzer measurements were used to infer the composition of sub-100 nm diameter Southern Ocean marine aerosols at Cape Grim in November and December 2007. This study focuses on a short-lived high sea spray aerosol (SSA) event on 7–8 December wit...
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ftqueensland:oai:eprints.qut.edu.au:95128 2024-05-19T07:48:58+00:00 Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim Cravigan, Luke Ristovski, Zoran Modini, Robin Keywood, Melita Gras, John 2015 application/pdf https://eprints.qut.edu.au/95128/ unknown Wiley-Blackwell Publishing, Inc. https://eprints.qut.edu.au/95128/1/95128.pdf https://eprints.qut.edu.au/95128/8/95128s.pdf doi:10.1002/2014JD022601 Cravigan, Luke, Ristovski, Zoran, Modini, Robin, Keywood, Melita, & Gras, John (2015) Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim. Journal of Geophysical Research: Atmospheres, 120(5), pp. 1848-1864. https://eprints.qut.edu.au/95128/ Institute of Health and Biomedical Innovation; Science & Engineering Faculty free_to_read Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au Journal of Geophysical Research: Atmospheres CCN Cape Grim deliquescence entrainment hygroscopic growth marine aerosol sea spray Contribution to Journal 2015 ftqueensland https://doi.org/10.1002/2014JD022601 2024-04-30T23:43:27Z Volatility-hygroscopicity tandem differential mobility analyzer measurements were used to infer the composition of sub-100 nm diameter Southern Ocean marine aerosols at Cape Grim in November and December 2007. This study focuses on a short-lived high sea spray aerosol (SSA) event on 7–8 December with two externally mixed modes in the Hygroscopic Growth Factor (HGF) distributions (90% relative humidity (RH)), one at HGF > 2 and another at HGF~1.5. The particles with HGF > 2 displayed a deliquescent transition at 73–75% RH and were nonvolatile up to 280°C, which identified them as SSA particles with a large inorganic sea-salt fraction. SSA HGFs were 3–13% below those for pure sea-salt particles, indicating an organic volume fraction (OVF) of up to 11–46%. Observed high inorganic fractions in sub-100 nm SSA is contrary to similar, earlier studies. HGFs increased with decreasing particle diameter over the range 16–97 nm, suggesting a decreased OVF, again contrary to earlier studies. SSA comprised up to 69% of the sub-100 nm particle number, corresponding to concentrations of 110–290 cm−3. Air mass back trajectories indicate that SSA particles were produced 1500 km, 20–40 h upwind of Cape Grim. Transmission electron microscopy (TEM) and X-ray spectrometry measurements of sub-100 nm aerosols collected from the same location, and at the same time, displayed a distinct lack of sea salt. Results herein highlight the potential for biases in TEM analysis of the chemical composition of marine aerosols. Article in Journal/Newspaper Southern Ocean Queensland University of Technology: QUT ePrints Journal of Geophysical Research: Atmospheres 120 5 1848 1864 |
institution |
Open Polar |
collection |
Queensland University of Technology: QUT ePrints |
op_collection_id |
ftqueensland |
language |
unknown |
topic |
CCN Cape Grim deliquescence entrainment hygroscopic growth marine aerosol sea spray |
spellingShingle |
CCN Cape Grim deliquescence entrainment hygroscopic growth marine aerosol sea spray Cravigan, Luke Ristovski, Zoran Modini, Robin Keywood, Melita Gras, John Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim |
topic_facet |
CCN Cape Grim deliquescence entrainment hygroscopic growth marine aerosol sea spray |
description |
Volatility-hygroscopicity tandem differential mobility analyzer measurements were used to infer the composition of sub-100 nm diameter Southern Ocean marine aerosols at Cape Grim in November and December 2007. This study focuses on a short-lived high sea spray aerosol (SSA) event on 7–8 December with two externally mixed modes in the Hygroscopic Growth Factor (HGF) distributions (90% relative humidity (RH)), one at HGF > 2 and another at HGF~1.5. The particles with HGF > 2 displayed a deliquescent transition at 73–75% RH and were nonvolatile up to 280°C, which identified them as SSA particles with a large inorganic sea-salt fraction. SSA HGFs were 3–13% below those for pure sea-salt particles, indicating an organic volume fraction (OVF) of up to 11–46%. Observed high inorganic fractions in sub-100 nm SSA is contrary to similar, earlier studies. HGFs increased with decreasing particle diameter over the range 16–97 nm, suggesting a decreased OVF, again contrary to earlier studies. SSA comprised up to 69% of the sub-100 nm particle number, corresponding to concentrations of 110–290 cm−3. Air mass back trajectories indicate that SSA particles were produced 1500 km, 20–40 h upwind of Cape Grim. Transmission electron microscopy (TEM) and X-ray spectrometry measurements of sub-100 nm aerosols collected from the same location, and at the same time, displayed a distinct lack of sea salt. Results herein highlight the potential for biases in TEM analysis of the chemical composition of marine aerosols. |
format |
Article in Journal/Newspaper |
author |
Cravigan, Luke Ristovski, Zoran Modini, Robin Keywood, Melita Gras, John |
author_facet |
Cravigan, Luke Ristovski, Zoran Modini, Robin Keywood, Melita Gras, John |
author_sort |
Cravigan, Luke |
title |
Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim |
title_short |
Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim |
title_full |
Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim |
title_fullStr |
Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim |
title_full_unstemmed |
Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim |
title_sort |
observation of sea-salt fraction in sub-100 nm diameter particles at cape grim |
publisher |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2015 |
url |
https://eprints.qut.edu.au/95128/ |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Journal of Geophysical Research: Atmospheres |
op_relation |
https://eprints.qut.edu.au/95128/1/95128.pdf https://eprints.qut.edu.au/95128/8/95128s.pdf doi:10.1002/2014JD022601 Cravigan, Luke, Ristovski, Zoran, Modini, Robin, Keywood, Melita, & Gras, John (2015) Observation of sea-salt fraction in sub-100 nm diameter particles at Cape Grim. Journal of Geophysical Research: Atmospheres, 120(5), pp. 1848-1864. https://eprints.qut.edu.au/95128/ Institute of Health and Biomedical Innovation; Science & Engineering Faculty |
op_rights |
free_to_read Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
op_doi |
https://doi.org/10.1002/2014JD022601 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
5 |
container_start_page |
1848 |
op_container_end_page |
1864 |
_version_ |
1799467375913861120 |